In traditional Chinese auspicious patterns, the combination of onion, lotus root, water chestnut and lychee is often used to imply "smart", "onion" and "cong" homophonic lotus root have holes, which are transparent and visible, meaning "Ming" water chestnut "and" bell "homophonic lychee" Li "and" Li "homophonic red envelope with 2021 calendar printed with sticker seal on the back